/*
 *  Licensed to GraphHopper GmbH under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper GmbH licenses this file to you under the Apache License, 
 *  Version 2.0 (the "License"); you may not use this file except in 
 *  compliance with the License. You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.graphhopper.util.shapes;

import com.graphhopper.util.NumHelper;
import com.vividsolutions.jts.geom.Point;

/**
 * @author Peter Karich
 */
public class GHPoint {
    public double lat = Double.NaN;
    public double lon = Double.NaN;

    public GHPoint() {
    }

    public GHPoint(double lat, double lon) {
        this.lat = lat;
        this.lon = lon;
    }

    public static GHPoint parse(String str) {
        return parse(str, false);
    }

    public static GHPoint parseLonLat(String str) {
        return parse(str, true);
    }

    private static GHPoint parse(String str, boolean lonLatOrder) {
        String[] fromStrs = str.split(",");
        if (fromStrs.length == 2) {
            try {
                double fromLat = Double.parseDouble(fromStrs[0]);
                double fromLon = Double.parseDouble(fromStrs[1]);
                if (lonLatOrder)
                    return new GHPoint(fromLon, fromLat);

                return new GHPoint(fromLat, fromLon);
            } catch (Exception ex) {
            }
        }
        return null;
    }

    public double getLon() {
        return lon;
    }

    public double getLat() {
        return lat;
    }

    public boolean isValid() {
        return !Double.isNaN(lat) && !Double.isNaN(lon);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 83 * hash + (int) (Double.doubleToLongBits(this.lat) ^ (Double.doubleToLongBits(this.lat) >>> 32));
        hash = 83 * hash + (int) (Double.doubleToLongBits(this.lon) ^ (Double.doubleToLongBits(this.lon) >>> 32));
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null)
            return false;

        @SuppressWarnings("unchecked")
        final GHPoint other = (GHPoint) obj;
        return NumHelper.equalsEps(lat, other.lat) && NumHelper.equalsEps(lon, other.lon);
    }

    @Override
    public String toString() {
        return lat + "," + lon;
    }

    /**
     * Attention: geoJson is LON,LAT
     */
    public Double[] toGeoJson() {
        return new Double[]{lon, lat};
    }

    public static GHPoint from(Point point) {
        return new GHPoint(point.getY(), point.getX());
    }
}
